Podizač s dvostrukim paralelnim polugama

undergraduate thesis

• Title (english): Lift platform with double parallel lever system
• Author: Petar Banožić
• Mentor: Matija Hoić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

Tema ovog završnog rada je konstrukcijska razrada podizača s dvostrukim paralelnim
polugama, a namjena podizača je podizanje tereta od 1 tone na visinu od 1 metar. Projektni
parametri koji su zadani: dimenzija nosive platforme od 2m x 1m, brzina dizanja od 10 m/min
te hidraulički pogon. Neki od zahtjeva koje podizač mora zadovoljiti su da nosiva platforma
mora biti horizontalna tijekom dizanja radi sigurnog transporta tereta, da kompaktnost
konstrukcije mora biti što bolja i pogonska sila što manja. U uvodu rada je razmatranje o
vrstama podizača za različite namjene i uvjete koji se nalaze na tržištu. Nakon uvoda prikazana
su koncepcijska rješenja različitih podizača, te je na kraju odabrano optimalno rješenje za
zadane parametre. U nastavku su izračunata opterećenja na dijelove podizača i s tim izračunatim
opterećenjima provjereni su svi kritični dijelovi konstrukcije: hidraulički cilindri, zupčanici,
poluge, svornjaci i zavari. Programski paket Excel je korišten za određivanje opterećenja u
odnosu na položaj kuta zakreta poluge i s pomoću programa napravljeni su svi grafovi, a 3D
model podizača napravljen je u programskom paketu Solidworks te na osnovu njega sklopni
crtež.

Abstract (english)

The theme of this thesis is a design of a lifter with a double parallel lever system. The purpose od the
lifter is lifting cargo of 1 tone on the height od 1 meter. Parameters are platform dimensions of
2m x 1m, speed of lifting 10 m/min and hydraulic drive. Some of the requirements are: platform
of the lifter must stay horizontal during lifting which allows safe transport of the cargo, then
the compactness of the construction need to be as good as posible and hydraulic force as small
as possible. The introduction gives consideration of the various types of lifting platforms with
different purposes and conditions that are on the market. After introduction conceptual solutions
of different lifters are presented and optimal solution for the given parameters is selected. Then
the loads on the lifting parts are calculated. With the calculated loads, all critical parts of the
structure were checked: hydraulic cylinder, gears, levers, pins and welds. Excel software
package were used to define loads in the relation of the position of the angle of levers, all the
graphs were made in the Excel. 3D model of the lifter was made in the Solidworks sotfware
package and a technical documenation based on it

• Keywords: podizač; paralelne poluge; hidraulički cilindar; zupčanici
• Keywords (english): platform; parallel lever system; hydraulic cylinder; gears
• Language: croatian
• URN:NBN: urn:nbn:hr:235:701647
• Study programme: Title: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering; Course: Design; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-09-24 10:38:55